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	<title>The GNU General Public License (GPL)</title>
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<h1>The GNU General Public License (GPL)</h1>
<h2>Version 2, June 1991</h2>
<p>Copyright (C) 1989, 1991 Free Software Foundation, Inc.<br />
                          59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</p>
<p>Everyone is permitted to copy and distribute verbatim copies<br />
                          of this license document, but changing it is not allowed.</p>

<p><strong>Preamble</strong></p>
<p>The licenses for most software are designed to take away your freedom to share
  and change it. By contrast, the GNU General Public License is intended to guarantee
  your freedom to share and change free software--to make sure the software is
  free for all its users. This General Public License applies to most of the
  Free Software Foundation's software and to any other program whose authors
  commit to using it. (Some other Free Software Foundation software is covered
  by the GNU Library General Public License instead.) You can apply it to your
  programs, too.</p>
<p>When we speak of free software, we are referring to freedom, not price. Our
  General Public Licenses are designed to make sure that you have the freedom
  to distribute copies of free software (and charge for this service if you wish),
  that you receive source code or can get it if you want it, that you can change
  the software or use pieces of it in new free programs; and that you know you
  can do these things.</p>
<p>To protect your rights, we need to make restrictions that forbid anyone to
  deny you these rights or to ask you to surrender the rights. These restrictions
  translate to certain responsibilities for you if you distribute copies of the
  software, or if you modify it.</p>
<p>For example, if you distribute copies of such a program, whether gratis or
  for a fee, you must give the recipients all the rights that you have. You must
  make sure that they, too, receive or can get the source code. And you must
  show them these terms so they know their rights.</p>
<p>We protect your rights with two steps: (1) copyright the software, and (2)
  offer you this license which gives you legal permission to copy, distribute
  and/or modify the software.</p>
<p>Also, for each author's protection and ours, we want to make certain that
  everyone understands that there is no warranty for this free software. If the
  software is modified by someone else and passed on, we want its recipients
  to know that what they have is not the original, so that any problems introduced
  by others will not reflect on the original authors' reputations.</p>
<p>Finally, any free program is threatened constantly by software patents. We
  wish to avoid the danger that redistributors of a free program will individually
  obtain patent licenses, in effect making the program proprietary. To prevent
  this, we have made it clear that any patent must be licensed for everyone's
  free use or not licensed at all.</p>
<p>The precise terms and conditions for copying, distribution and modification
  follow.</p>

<p><strong>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</strong></p>
<p><strong>0</strong>. This License applies to any program or other work which
  contains a notice placed by the copyright holder saying it may be distributed
  under the terms of this General Public License. The &quot;Program&quot;, below, refers
  to any such program or work, and a &quot;work based on the Program&quot; means either
  the Program or any derivative work under copyright law: that is to say, a work
  containing the Program or a portion of it, either verbatim or with modifications
  and/or translated into another language. (Hereinafter, translation is included
  without limitation in the term &quot;modification&quot;.) Each licensee is addressed
  as &quot;you&quot;.</p>
<p>Activities other than copying, distribution and modification are not covered
  by this License; they are outside its scope. The act of running the Program
  is not restricted, and the output from the Program is covered only if its contents
  constitute a work based on the Program (independent of having been made by
  running the Program). Whether that is true depends on what the Program does.</p>
<p><strong>1</strong>. You may copy and distribute verbatim copies of the Program's
  source code as you receive it, in any medium, provided that you conspicuously
  and appropriately publish on each copy an appropriate copyright notice and
  disclaimer of warranty; keep intact all the notices that refer to this License
  and to the absence of any warranty; and give any other recipients of the Program
  a copy of this License along with the Program.</p>
<p>You may charge a fee for the physical act of transferring a copy, and you
  may at your option offer warranty protection in exchange for a fee.</p>
<p><strong>2</strong>. You may modify your copy or copies of the Program or any
  portion of it, thus forming a work based on the Program, and copy and distribute
  such modifications or work under the terms of Section 1 above, provided that
  you also meet all of these conditions:</p>
<blockquote>
  <p>a) You must cause the modified files to carry prominent notices stating
    that you changed the files and the date of any change.</p>
  <p>b) You must cause any work that you distribute or publish, that in whole
    or in part contains or is derived from the Program or any part thereof, to
    be licensed as a whole at no charge to all third parties under the terms
    of this License.</p>
  <p>c) If the modified program normally reads commands interactively when run,
    you must cause it, when started running for such interactive use in the most
    ordinary way, to print or display an announcement including an appropriate
    copyright notice and a notice that there is no warranty (or else, saying
    that you provide a warranty) and that users may redistribute the program
    under these conditions, and telling the user how to view a copy of this License.
    (Exception: if the Program itself is interactive but does not normally print
    such an announcement, your work based on the Program is not required to print
    an announcement.)</p>
</blockquote>
<p>These requirements apply to the modified work as a whole. If identifiable
  sections of that work are not derived from the Program, and can be reasonably
  considered independent and separate works in themselves, then this License,
  and its terms, do not apply to those sections when you distribute them as separate
  works. But when you distribute the same sections as part of a whole which is
  a work based on the Program, the distribution of the whole must be on the terms
  of this License, whose permissions for other licensees extend to the entire
  whole, and thus to each and every part regardless of who wrote it.</p>
<p>Thus, it is not the intent of this section to claim rights or contest your
  rights to work written entirely by you; rather, the intent is to exercise the
  right to control the distribution of derivative or collective works based on
  the Program.</p>
<p>In addition, mere aggregation of another work not based on the Program with
  the Program (or with a work based on the Program) on a volume of a storage
  or distribution medium does not bring the other work under the scope of this
  License.</p>
<p><strong>3</strong>. You may copy and distribute the Program (or a work based
  on it, under Section 2) in object code or executable form under the terms of
  Sections 1 and 2 above provided that you also do one of the following:</p>
<blockquote>
  <p>a) Accompany it with the complete corresponding machine-readable source
    code, which must be distributed under the terms of Sections 1 and 2 above
    on a medium customarily used for software interchange; or,</p>
  <p>b) Accompany it with a written offer, valid for at least three years, to
    give any third party, for a charge no more than your cost of physically performing
    source distribution, a complete machine-readable copy of the corresponding
    source code, to be distributed under the terms of Sections 1 and 2 above
    on a medium customarily used for software interchange; or,</p>
  <p>c) Accompany it with the information you received as to the offer to distribute
    corresponding source code. (This alternative is allowed only for noncommercial
    distribution and only if you received the program in object code or executable
    form with such an offer, in accord with Subsection b above.)</p>
</blockquote>
<p>The source code for a work means the preferred form of the work for making
  modifications to it. For an executable work, complete source code means all
  the source code for all modules it contains, plus any associated interface
  definition files, plus the scripts used to control compilation and installation
  of the executable. However, as a special exception, the source code distributed
  need not include anything that is normally distributed (in either source or
  binary form) with the major components (compiler, kernel, and so on) of the
  operating system on which the executable runs, unless that component itself
  accompanies the executable.</p>
<p>If distribution of executable or object code is made by offering access to
  copy from a designated place, then offering equivalent access to copy the source
  code from the same place counts as distribution of the source code, even though
  third parties are not compelled to copy the source along with the object code.</p>
<p><strong>4</strong>. You may not copy, modify, sublicense, or distribute the
  Program except as expressly provided under this License. Any attempt otherwise
  to copy, modify, sublicense or distribute the Program is void, and will automatically
  terminate your rights under this License. However, parties who have received
  copies, or rights, from you under this License will not have their licenses
  terminated so long as such parties remain in full compliance.</p>
<p><strong>5</strong>. You are not required to accept this License, since you
  have not signed it. However, nothing else grants you permission to modify or
  distribute the Program or its derivative works. These actions are prohibited
  by law if you do not accept this License. Therefore, by modifying or distributing
  the Program (or any work based on the Program), you indicate your acceptance
  of this License to do so, and all its terms and conditions for copying, distributing
  or modifying the Program or works based on it.</p>
<p><strong>6</strong>. Each time you redistribute the Program (or any work based
  on the Program), the recipient automatically receives a license from the original
  licensor to copy, distribute or modify the Program subject to these terms and
  conditions. You may not impose any further restrictions on the recipients'
  exercise of the rights granted herein. You are not responsible for enforcing
  compliance by third parties to this License.</p>
<p><strong>7</strong>. If, as a consequence of a court judgment or allegation
  of patent infringement or for any other reason (not limited to patent issues),
  conditions are imposed on you (whether by court order, agreement or otherwise)
  that contradict the conditions of this License, they do not excuse you from
  the conditions of this License. If you cannot distribute so as to satisfy simultaneously
  your obligations under this License and any other pertinent obligations, then
  as a consequence you may not distribute the Program at all. For example, if
  a patent license would not permit royalty-free redistribution of the Program
  by all those who receive copies directly or indirectly through you, then the
  only way you could satisfy both it and this License would be to refrain entirely
  from distribution of the Program.</p>
<p>If any portion of this section is held invalid or unenforceable under any
  particular circumstance, the balance of the section is intended to apply and
  the section as a whole is intended to apply in other circumstances.</p>
<p>It is not the purpose of this section to induce you to infringe any patents
  or other property right claims or to contest validity of any such claims; this
  section has the sole purpose of protecting the integrity of the free software
  distribution system, which is implemented by public license practices. Many
  people have made generous contributions to the wide range of software distributed
  through that system in reliance on consistent application of that system; it
  is up to the author/donor to decide if he or she is willing to distribute software
  through any other system and a licensee cannot impose that choice.</p>
<p>This section is intended to make thoroughly clear what is believed to be a
  consequence of the rest of this License.</p>
<p><strong>8</strong>. If the distribution and/or use of the Program is restricted
  in certain countries either by patents or by copyrighted interfaces, the original
  copyright holder who places the Program under this License may add an explicit
  geographical distribution limitation excluding those countries, so that distribution
  is permitted only in or among countries not thus excluded. In such case, this
  License incorporates the limitation as if written in the body of this License.</p>
<p><strong>9</strong>. The Free Software Foundation may publish revised and/or
  new versions of the General Public License from time to time. Such new versions
  will be similar in spirit to the present version, but may differ in detail
  to address new problems or concerns.</p>
<p>Each version is given a distinguishing version number. If the Program specifies
  a version number of this License which applies to it and &quot;any later version&quot;,
  you have the option of following the terms and conditions either of that version
  or of any later version published by the Free Software Foundation. If the Program
  does not specify a version number of this License, you may choose any version
  ever published by the Free Software Foundation.</p>
<p><strong>10</strong>. If you wish to incorporate parts of the Program into
  other free programs whose distribution conditions are different, write to the
  author to ask for permission. For software which is copyrighted by the Free
  Software Foundation, write to the Free Software Foundation; we sometimes make
  exceptions for this. Our decision will be guided by the two goals of preserving
  the free status of all derivatives of our free software and of promoting the
  sharing and reuse of software generally.</p>
<p><strong>NO WARRANTY</strong></p>
<p><strong>11</strong>. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE
  IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
  PARTIES PROVIDE THE PROGRAM &quot;AS IS&quot; WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
  OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
  PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE,
  YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.</p>
<p><strong>12</strong>. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED
  TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
  AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
  INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
  OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO
  LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR
  THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
  EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  DAMAGES.</p>
<p>END OF TERMS AND CONDITIONS</p>
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